东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (8): 1124-1127.DOI: 10.12068/j.issn.1005-3026.2014.08.014

• 材料与冶金 • 上一篇    下一篇

晶粒尺寸对含铜锡中铬铁素体不锈钢耐蚀性的影响

张向军，沈鑫珺，张淑敏，刘振宇   

  1. (东北大学 轧制技术及连轧自动化国家重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2013-11-04 修回日期:2013-11-04 出版日期:2014-08-15 发布日期:2014-04-11
  • 通讯作者: 张向军
  • 作者简介:张向军(1989-)，男，甘肃陇西人，东北大学博士研究生；刘振宇(1967-)，男，内蒙古赤峰人，东北大学教授，博士生导师.
  • 基金资助:
    国家科技支撑计划项目(2012BAE04B02)；国家自然科学基金资助项目(51271050).

Influence of Grain Size on the Corrosion Resistance of Medium Chromium Ferritic Stainless Steel Containing Cu and Sn〓

ZHANG Xiangjun， SHEN Xinjun， ZHANG Shumin， LIU Zhenyu   

  1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2013-11-04 Revised:2013-11-04 Online:2014-08-15 Published:2014-04-11
  • Contact: ZHANG Xiangjun
  • About author:-
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摘要： 以含低熔点元素Cu和Sn的超纯165%(质量分数)Cr铁素体不锈钢为实验材料，通过在35℃恒温6%(质量分数)FeCl3溶液中对实验钢进行浸泡腐蚀实验，并采用三电极体系测定实验钢的极化曲线，初步研究了晶粒尺寸对这种铁素体不锈钢耐蚀性能的影响.实验中，采用经典的失重法计算腐蚀速率，利用动电位扫描法测绘极化曲线，以进一步探究实验钢的腐蚀过程.研究表明，这种铁素体不锈钢的点蚀电位值随晶粒尺寸增大而大幅提高.浸泡腐蚀实验结果证实，存在一个相对合理的晶粒尺寸范围，晶粒尺寸过小或过大都不利于提高耐蚀性能.

关键词: 铁素体不锈钢, 晶粒尺寸, 耐腐蚀性能, 点蚀电位, 极化曲线

Abstract: The corrosion test of ultra purified 165 wt%Cr ferritic stainless steel containing Cu and Sn was carried out by immerging the specimens into the 6 wt% FeCl3 solution at 35 ℃， and the polarization curves of the steel were measured using potentiodynamic polarization method. The influence of grain size on the corrosion resistance of ferritic stainless steel was investigated. The corrosion rates were calculated through gravimetric tests. The results show that the pitting potential of the stainless steel greatly rises with the coarsening of grain size. There is a relative reasonable range of grain size and overfined or overcoarsened grain size are unbeneficial for the corrosion resistance of the tested steel.

Key words: ferritic stainless steel, grain size, corrosion resistance, pitting potential, polarization curve

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